Elma DT5500A
side 25
Display Indicators
The Primary Display
：
Indicate the current function testing values
The Secondary Display
：
It shows the output DCV while you test the insulation
resistance, and the battery voltage while the ACV
The Analog Bar
：
indicate the current function testing value in synchronous with the
primary display.
:While testing the insulation resistance, the symbol
“ “ flashes frequently if the voltage is
over 30V.
•)))
: While testing the insulation resistance, the symbol
”
“ flashes frequently and the
buzzer warns continually if the outside voltage is over 30V.
The symbol
“
•)))
“ is indicated while
LO
Ω
≤35
Ω and the
BZ warns continuously.
LOCK
：
Push down the
“LOCK” button while you test the insulation resistance and the
symbol
“
” is indicated.
LOBAT
：
The display shows
“LOBAT” when the voltage drops below 7.5V
MAX/MIN:
Stand for the maximum or the minimum.
ZERO :
Digital zero adjusting
。
HOLD :
The digital holding function for the primary display.
AC
，
DC
，
:
The indicator for the voltage property.
V
，
M
Ω
，
Ω:
The measured dimension units
。
Insulation resistance measurements
a)
Turn the function switch from the
“OFF” position to the left
（
4000 M
Ω/1000V---4000/
M
Ω500V---4000 MΩ/250V---1000 MΩ/125V
）
,and chose one of the voltage-block( there
are 4 ranges namely, 4 M
Ω40 MΩ400 MΩ4000 MΩ, can be switched automatically for
every voltage-block.)
b)
Connect two testing lines to the tested
；
c)
Push down and hold the
“TEST” button /or press the “ LOCK” keystoke first and then the
“TEST” button, if the tested is electriferous and its voltage ( AC/DC) is over 30V, it will
refuse work and no high-voltage testing occurs, simultaneity, it shows
“>30V” on the LCD,
the symbol
“ ” flashes, and the buzzer warns frequently. if the tested is diselectriferous
or its voltage is lower than 30V, it will enter into the formal testing process and brings the
high-voltage. on the primary display, the insulation resistance in M
Ω is indicated in-phase
with analog bar; on the secondary display, the tested insulation voltage in V (DC) is
indicated, the symbol
“ ” flashes and the buzzer warns frequently
